Twilight Purple vs Ultramarine Blue

How close are they?

ΔE 13.0, fair: the same colour family, but not a straight swap. Ultramarine Blue is a little darker, much more saturated than Twilight Purple.

Can I use Ultramarine Blue instead of Twilight Purple?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Ultramarine Blue is a little darker, much more saturated than Twilight Purple.

Can I use Twilight Purple instead of Ultramarine Blue?

The same difference applies the other way round: Twilight Purple is a little lighter, much more muted.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.